The Legrand DX3 RCCB HPI FP 40A 30mA is a four-pole (4P) residual current circuit breaker designed for 40A residential circuits. Installed in your final circuit, this device provides essential earth leakage protection by monitoring the balance between phase and neutral currents. Its primary function is to prevent electrocution and electrical fires by disconnecting the 400V supply when a 30mA leakage is detected.
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